John hunt



I .HUNT. PROT R PQR SHAPTING.

Ptented Mar. 1s, 1894.

. IHR

UNITED STATES PATENT OFFICE.

JOHN HUNT, OF CARLTON, VICTORIA.

PROTECTOR FOR SHAFTING.

A SPECIFICATION forming part of Letters Patent No. 516,489, dated March13, 1894.

Application iiled August 14, 1893. Serial No.483,058. (No model.)

To @ZZ whom t may concern:

Be it known that I, JOHN HUNT, machinist, a subject of the Queen ofGreat Britain, and a resident of Nicholson Street, Carlton, in theColony of Victoria, have invented a certain new and Improved Thimble orCylindrical Protector for Shafting or Spindles of Machinery, of whichthe following is a speciication.

This invention has been devised for the purpose of affording the publicwith a protector against wear and tear ot shafting or spindles inmachinery generally and applies most particularly to the undergroundpulley spindles of cable-tramways.

It has been found in the past'that the constant friction and action ofdust, Water and grit wears away the journals or revolving spindles ofunderground cable-tramway'pulleys, while in ordinary machinery the Wearand tear on spindles particularly those of a small dialneter is found tobe considerable. Now my invention has been devised to obviate thewearing away of such spindles and consists in the employment of aclosely fitting collared thimble or cylinder placed over the spindle.The protector is constructed in the form of a cylinder terminating atone end in a collar, or flange, of increased diameter,which is intendedto butt against the hub of the wheel. This collar or fiange is providedwith oneor more bites or indents in its periphery, said bites or indentsbeing for the purpose `of fitting to and engaging with plugs or pins ofmetal set on the face of the said hub of the wheel.

In order that my invention may be the bet,- ter understood reference maybe made to the accompanying drawings in which- Figure 1 shows a view(partly in section) of my new or improved thimble or cylindricalprotector attached on and to the spindle and hub of a wheel. Fig. 2 isafront elevation of my thimble or cylindrical protector. Fig. 3 is a viewshowing the plugs or teeth on hub; Fig. 4 an alternative form ofconstruction of the collar or liange-while Fig. 5 is an alternative formof construction of both the shaft or spindle and the thimble orcylindrical protector.

In the drawings A is the thimble or protector constructed (as aforesaid)in the form of a cylinder, B being the collar or flange at end of samein which bites or indents B are provided. C is the spindle on which thehub D is centered, E being the spokes of the pulley wheel or otherrevolving object. D are plugs or teeth of metal which fit into theindentations B in such a manner as to cause the collar or flange B torotate synchronously with the hub D.7

Fig. 4 illustrates an alternative construction of the flange B2 fromwhich it will be seen that the plugs D and indentations B may bedispensed with, and in their place the ange or collar B2 may beconstructed of a square form, in which case the end face of the hub Dwill have provided upon it an indented square box to receive and rotatethe square flange B2. I have shown this particular figure in order toillustrate an4 alternative form of construction of the flange Bi but inpractice the construction of the said Iiange B2 may be varied to anyshape or design so that when fitted to the face of the hub D it mayberotated synchronously by the movement of the said hub D. If preferredthe shaft or spindle C may be of a square section or otherwise shaped,as at Fig. 5 from which illustration it will be seen that a flat G isprovided or cut on the shaft or spindle C, the cylindrical protectorbeing shaped so as to meet this alternate construction.

The modus operandi of my invention is as followsz-Presume that myprotector is to be employed in connection with revolving undergroundpulleys of cable tramways. Preferably, but not arbitrarily, I employ thethimbles or protectors in the arrangement shown in Fig. lof thedrawings, and it will be seen from a glance at this figure that when thespoke E, hub D and shaft C revolve, the thimbles or protectors A willrevolve therewith in the bearings provided for the purpose, the rotatorypersuasion being communicated from the pins or plugs B to the thimblesor protectors A and it will be seen that all Wear and tear usually borneby the spindle C will be inflicted on the thimbles or protectors A Theselatter are easily removable and replaceable so that an attendant may ina short space of time replace any worn thimble or protector with a freshone in IOO a few minutes, and thus obviate the necessity of removing thewhole pulley or Wheel and inserting therein a new spindle or shaft at aconsiderableloss of timeand money. Thebearings must of course be of asufciently large diameter to admit the increased diameter ot' theprotector and I prefer to construct the bearings of a harder metal thanthe protector so that the removable protector may take the et'- fect ofWear and tear. The rotatory plugsD Would not be required were aconstruction similar to that shown on Figs. 4 and 5 employed, as therotation of the shaft C would carry With it, by reason of the formationG, the thimble or protector A, or the hub D would carry with it, whenrotated the square flange 132.

I would here point out that my invention is not alone applicable to thespindles ot' underground cable'trarnway pulleys, as a glance at thedrawings will illustrate to the practiced mind that my protector can beemployed to any rotating shafting. I prefer that thc di- `movablethimbles slipped over the journals and each having a flange and aninterlocking connection between each sleeve-llange and the end ot thehub to cause the sleeve to rotate with the hub, substantially asspecified.

Signed this lst day of July, 1893.

J Oil-IN HUNT.

Vitnesses:

A. O. SAoHsE,

O'. E., Jlfelbotmnc, A. I-IARKER.

Clerk, llfelbmwnc.

